show answered question history on dashboard

hive-c0re/src/operator_questions.rs

@@ -168,6 +168,21 @@ impl OperatorQuestions {
         rows.collect::<rusqlite::Result<Vec<_>>>()
             .map_err(Into::into)
     }
+
+    /// Last `limit` answered questions, newest-first.
+    pub fn recent_answered(&self, limit: u64) -> Result<Vec<OpQuestion>> {
+        let conn = self.conn.lock().unwrap();
+        let mut stmt = conn.prepare(
+            "SELECT id, asker, question, options_json, multi, asked_at, answered_at, answer, deadline_at
+               FROM operator_questions
+              WHERE answered_at IS NOT NULL
+              ORDER BY answered_at DESC
+              LIMIT ?1",
+        )?;
+        let rows = stmt.query_map(params![limit as i64], row_to_question)?;
+        rows.collect::<rusqlite::Result<Vec<_>>>()
+            .map_err(Into::into)
+    }
 }
 
 fn row_to_question(row: &rusqlite::Row<'_>) -> rusqlite::Result<OpQuestion> {